Get rid of the velociraptor and put in a cheap ($100) SSD for WoW (and your other gaming needs). I use the RiData MLC 32GB SSD and it works like a charm. Everyone telling you that you need some expensive Intel version is wrong, IMHO.

check out the configurator for i7 machines at www.buyxg.com. You can the same system I did for $1,500, including a much nicer video card than the 260.